Tutorial: Car Paint Materials (1/3: Simple Car Paint)
Currently, the best way to create a carpaint shader in Corona is by using a blend of two Corona materials - one for shiny "coating" and one for matte "base" and mixing them using a falloff map.
You can also download "Car Paints" material set by Jeff Patton and other free high-quality material sets from the resources section on our website.
Result of blending the two materials using "falloff" map
Single Corona material
Single Corona Material is capable of producing similar results but does not provide such detailed controls over reflection's appearance: